154 The Safe torque off function
STO abbreviations
Abbreviation Reference
Description
Cat.
EN ISO 13849-1
Classification of the safety-related parts of a control
system in respect of their resistance to faults and their
subsequent behavior in the fault condition, and which is
achieved by the structural arrangement of the parts, fault
detection and/or by their reliability. The categories are: B,
1, 2, 3 and 4.
CCF
EN ISO 13849-1
Common cause failure (%)
DC
EN ISO 13849-1
Diagnostic coverage
FIT
IEC 61508
Failure in time: 1E-9 hours
HFT
IEC 61508
Hardware fault tolerance
MTTF
d
EN ISO 13849-1
Mean time to dangerous failure: (The total number of life
units) / (the number of dangerous, undetected failures)
during a particular measurement interval under stated
conditions
PFD
IEC 61508
Probability of failure on demand
PFH
D
IEC 61508
Probability of dangerous failures per hour
PL
EN ISO 13849-1
Performance level. Levels a…e correspond to SIL
SC
IEC 61508
Systematic capability
SFF
IEC 61508
Safe failure fraction (%)
SIL
IEC 61508
Safety integrity level (1…3)
SILCL
IEC/EN 62061
Maximum SIL (level 1…3) that can be claimed for a safety
function or subsystem
SS1
IEC/EN 61800-5-2 Safe stop 1
STO
IEC/EN 61800-5-2 Safe torque off
T1
IEC 61508
Proof test interval. T1 is a parameter used to define the
probabilistic failure rate (PFH or PFD) for the safety
function or subsystem. Performing a proof test at a
maximum interval of T1 is required to keep the SIL
capability valid. The same interval must be followed to
keep the PL capability (EN ISO 13849) valid. Note that
any T1 values given cannot be regarded as a guarantee
or warranty.
See also section
(page
).
Summary of Contents for ACS880-M04
Page 1: ...ABB machinery drives Hardware manual ACS880 M04 drive ...
Page 4: ......
Page 12: ...12 Table of contents ...
Page 20: ...20 Safety instructions ...
Page 28: ...28 About the manual ...
Page 38: ...38 Operation principle and hardware description ...
Page 48: ...48 Planning the cabinet installation ...
Page 54: ...54 Mechanical installation ...
Page 72: ...72 Planning the electrical installation ...
Page 98: ...98 Electrical installation ...
Page 102: ...102 Start up ...
Page 108: ...108 Maintenance ...
Page 140: ...140 Technical data ...
Page 158: ...158 Mains chokes ...
Page 164: ...164 EMC filters 7 Attach the terminal blocks to the filter 1 6 5 4 3 ...
Page 166: ...166 EMC filters 6 Attach the terminal blocks to the filter 1 2 3 4 ...
Page 168: ...168 EMC filters ...
Page 182: ...Dimension drawings 182 Frame size R1 H1 H2 W D ...
Page 183: ...Dimension drawings 183 Frame size R2 H2 H1 W D ...
Page 184: ...Dimension drawings 184 Frame size R3 D W H1 H2 ...
Page 185: ...Dimension drawings 185 Frame size R4 W H1 H2 D ...
Page 187: ...187 Dimension drawings EMC filters type JFI x1 JFI A1 ...
Page 188: ...Dimension drawings 188 JFI B1 ...
Page 189: ...189 Dimension drawings EMC filters type JFI 0x ...
Page 191: ...191 Dimension drawings Brake resistors type JBR xx ...
Page 193: ...193 Dimension drawings ...
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